Effect of Isovalent Substitution on the Formation and Luminescence Properties of Solid Solutions BiPXV1-XO4 Doped with Europium (III)

2015 ◽  
Vol 230 ◽  
pp. 62-66 ◽  
Author(s):  
Konstantin L. Bychkov ◽  
Katerina V. Terebilenko ◽  
Rostyslav P. Linnik ◽  
Nikolay S. Slobodyanik
Keyword(s):  
Solid Solution ◽  
Solid State ◽  
Luminescence Spectrum ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Single Phase ◽  
Photoluminescence Spectroscopy ◽  
Electronic Transitions ◽  
X Ray ◽  
Isovalent Substitution

Solid solution BiP0.9V0.1O4 from BiPXV1-XO4 system has been synthesized by solid state synthesis at 973 K. It has been shown that the phosphate-vanadate can be prepared as a single phase for x =0.9, while higher degree of (P/V)O4 substitution in BiVO4 has not been detected for the range studied. The substitution peculiarities have been investigated by X-Ray powder diffraction, infrared and photoluminescence spectroscopy. The luminescence spectrum of BiPXV1-XO4:Eu3+ solid solution reveal intensive photoluminescence lines related to f-f electronic transitions in Eu3+ ions.

Synthesis and Luminescence Properties of KBi(MoO4)2:Eu3+

2015 ◽  
Vol 230 ◽  
pp. 160-165 ◽  
Author(s):  
K. Terebilenko ◽  
Mila Miroshnichenko ◽  
Inna Tokmenko ◽  
Vitalii Chornii ◽  
Yuriy Hizhnyi ◽  
...  
Keyword(s):  
Solid State ◽  
Ir Spectroscopy ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Spectral Region ◽  
Solid State Synthesis ◽  
Electronic Transitions ◽  
Luminescence Spectroscopy ◽  
X Ray ◽  
Dta Analysis

Polycrystalline KBi(MoO4)2 has been grown from molten system K-Bi-Mo-O. Solid solutions KBi1-xEux(MoO4)2 (x = 0.001 - 0.100) have been prepared by solid state synthesis and characterized by powder IR spectroscopy, DTA analysis, X-Ray powder diffraction and luminescence spectroscopy. It was found that all investigated Eu3+-containing molybdates reveal intensive photoluminescence lines related to f-f electronic transitions in Eu3+ ions. The KBi1-XEuX(MoO4)2 crystals with low Eu3+ concentration reveal also intrinsic host luminescence under excitation in the ultraviolet (UV) spectral region at T = 4.2 K.

Powder-diffraction data for several solid solutions with the compositions (CaxSr1−x)CuO2 and (CaxSr1−x)2CuO3

1995 ◽  
Vol 10 (4) ◽  
pp. 296-299 ◽  
Author(s):  
S. T. Misture ◽  
C. Park ◽  
R. L. Snyder ◽  
B. Jobst ◽  
B. Seebacher
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Diffraction Data ◽  
Solid State Reaction ◽  
High Temperature Superconductors ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Diffraction Patterns

Several compositions of the solid solutions (CaxSr1−x)CuO2 and (CaxSr1−x)2CuO3, both of which are found as minor phases in the high-temperature superconductors, were prepared by solid-state reaction. X-ray powder-diffraction patterns for three compositions of (CaxSr1−x)CuO2 and two for (CaxSr1−x)2CuO3 are presented.

X-ray powder diffraction characterization of Bi14(Sr,Ca)12O33 solid solutions

1996 ◽  
Vol 11 (4) ◽  
pp. 268-275 ◽  
Author(s):  
Winnie Wong-Ng ◽  
F. Jiang ◽  
Bryan R. Jarabek ◽  
Gregory J. McCarthy
Keyword(s):  
Solid Solution ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Cell Parameter ◽  
X Ray Diffraction ◽  
Powder Diffraction File ◽  
X Ray ◽  
Solid Solution Range

Powder X-ray diffraction was used to investigate the solid solution range of the Bi14SrxCa12−xO33 series in the Bi–Sr–Ca–O system. Solid solution forms over the range 1≤x≤7 in Bi14SrxCa12−xO33. Experimental X-ray reference patterns of selected members with x=1, 3, 5, and 7 have been prepared for the powder diffraction file (PDF). These phases are monoclinic, C2/m, with cell parameter a ranging from 21.473(4) to 21.868(4) Å, b from 4.3564(9) to 4.3898(9) Å, c from 12.753(2) to 12.962(2) Å, β from 102.91(2)° to 102.79(1)°, and V from 1162.9(3) to 1213.5(3) Å3, respectively. These parameters increase monotonically as Ca is continuously replaced by the larger Sr.

Drastic Decrease of the Curie Temperature in the Solid Solution GdRuxCd1–x

2009 ◽  
Vol 64 (3) ◽  
pp. 356-360 ◽  
Author(s):  
Frank Tappe ◽  
Falko M. Schappacher ◽  
Wilfried Hermes ◽  
Matthias Eul ◽  
Rainer Pöttgen
Keyword(s):  
Solid Solution ◽  
Magnetic Properties ◽  
Curie Temperature ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Induction Melting ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Drastic Effect ◽  
Cscl Structure

Five samples of solid solutions GdRuxCd1−x extending up to x ≈ 0.25 were synthesized by induction-melting of the elements in sealed tantalum tubes. According to X-ray powder diffraction data, the GdRuxCd1−x samples crystallize with the cubic CsCl structure. The structures of two crystals were refined from diffractometer data: Pm3̄m, a = 372.41(4) pm, wR2 = 0.0363, 45 F2, 5 variables for GdRu0.10(1)Cd0.90(1) and a = 367.70(4) pm, wR2 = 0.0301, 39 F2, 5 variables for GdRu0.20(1)Cd0.80(1). The cadmium-ruthenium substitution has a drastic effect on the magnetic properties. All samples order ferromagnetically, however, the Curie temperature decreases drastically from 258 K for GdCd to 63.6 K for GdRu0.20Cd0.80 with a Vegard-type behavior.

scholarly journals Long- and short-range structure studies of KBT-KBZ solid-solutions using synchrotron radiation

2015 ◽  
Vol 44 (23) ◽  
pp. 10681-10688 ◽  
Author(s):  
Samuel Liu ◽  
Peter E. R. Blanchard ◽  
Zhaoming Zhang ◽  
Brendan J. Kennedy ◽  
Chris D. Ling
Keyword(s):  
Solid Solution ◽  
Synchrotron Radiation ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Short Range ◽  
X Ray ◽  
Diffraction Patterns ◽  
Short Range Structure

Synchrotron X-ray powder diffraction patterns of K0.5Bi0.5Ti1−xZrxO3 (KBT-KBZ), showing the pseudocubic tetragonal region at all intermediate compositions in the solid-solution.

Synthesis and Impedance Spectroscope of B-Doped La9.33+x/3(SiO4)6-x(BO4)xO2 Apatite Oxide Ion Conductor

2017 ◽  
Vol 904 ◽  
pp. 102-106
Author(s):  
Zhao Xiang Huang ◽  
Kan Yu ◽  
Jun Liang ◽  
Xiao Li Sheng
Keyword(s):  
Solid State ◽  
Powder Diffraction ◽  
Single Phase ◽  
Apatite Structure ◽  
Ion Conductor ◽  
X Ray ◽  
Oxide Ion Conductor ◽  
Conductivity Enhancement ◽  
Oxide Ion

B2O3 was doped into the oxide ion conductor La9.33(SiO4)6O2 according to the formula La9.33+x/3(SiO4)6-x(BO4)xO2 where 0 ≤ x ≤ 2. Samples were prepared by solid state reaction; difficulty was experienced in obtaining fully homogenised products at intermediate x, although they were nominally single-phase by X-ray powder diffraction. A small conductivity enhancement was observed at intermediate B content which further illustrates the important role of La vacancies in optimising the conductivity of La silicates with the apatite structure.

Subsolidus phase relations and crystal structures in the Pr1+xBa2−xCu3O7±δ system at 950 °C

2004 ◽  
Vol 19 (4) ◽  
pp. 320-324 ◽  
Author(s):  
G. B. Song ◽  
J. K. Liang ◽  
F. S. Liu ◽  
L. T. Yang ◽  
J. Luo ◽  
...  
Keyword(s):  
Solid Solution ◽  
Crystal Structures ◽  
Powder Diffraction ◽  
Single Phase ◽  
Rietveld Analysis ◽  
Phase Relations ◽  
Subsolidus Phase ◽  
X Ray ◽  
Rich Condition

Pr1+xBa2−xCu3O7±δ solid solution was investigated by means of X-ray powder diffraction and Rietveld analysis. Single-phase PrBa2Cu3O7±δ (Pr123) can be synthesized under a Pr-rich condition by sintering at 950 °C in air. The solubility of Pr1+xBa2−xCu3O7±δ solid solution is 0.08≤x≤0.80. The structure of Pr1+xBa2−xCu3O7±δ is orthorhombic for 0.08≤x<0.30, and transforms into tetragonal for 0.30≤x≤0.80. To form single-phase Pr123, the Ba sites in the Pr123 structure are partially occupied by excess Pr ions, and the smallest amount of excess Pr is x=0.08. Meanwhile, all Ba ions stay in the Ba sites.

X-Ray Powder Diffraction Characterization of BaR2CuO5 (R=Yttrium and the Lanthanides) and Related Compounds

1989 ◽  
Vol 4 (1) ◽  
pp. 2-8 ◽  
Author(s):  
W. Wong-Ng ◽  
M.A. Kuchinski ◽  
H.F. McMurdie ◽  
B. Paretzkin
Keyword(s):  
Solid Solution ◽  
Cell Volume ◽  
Powder Diffraction ◽  
Single Phase ◽  
Crystallographic Data ◽  
Space Group ◽  
X Ray ◽  
Cell Parameters ◽  
Related Compounds

AbstractA series of BaO:RxOy:CuO materials has been prepared where R=Y, La, Ce, Pr, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. They have been characterized by X-ray powder diffraction methods. All BaR2CuO5 phases, commonly referred to as the “green phases”, are orthorhombic with space group Pbnm(62) and are isostructural. These single phase materials could be prepared with most lanthanides, except for La, Ce, Pr, Nd and Tb. Possible reasons for the exceptions are discussed. Both La and Nd tend to form a brown solid solution of Ba2+2xR4-2xCu2-xO10-2x with a tetragonal space group of P4/mbm(127). The major phases found in the Ce, Pr and Tb compositions are the perovskite-related structures BaRO3, and in the Pr case, Ba2PrCu3O6+x as well. The cell parameters of the green phase materials increase progressively from the Lu compound to the Sm compound: a ranges from 7.0506(6) to 7.2754(4) Å, b from 12. 0534(8) to 12. 4029(7) Å, c from 5.6099(5) to 5. 7602(3) Å, and the cell volume from 476.75(6) to 519.78(4) Å3. A correlation of the crystallographic data with the size of the R elements is given.

Structures and isomerization in diamminedichloropalladium(II)

1996 ◽  
Vol 52 (6) ◽  
pp. 909-916 ◽  
Author(s):  
S. D. Kirik ◽  
L. A. Solovyov ◽  
A. I. Blokhin ◽  
I. S. Yakimov ◽  
M. L. Blokhina
Keyword(s):  
Phase Transitions ◽  
Solid State ◽  
Powder Diffraction ◽  
Single Phase ◽  
Layer Structure ◽  
Powder Materials ◽  
Space Group ◽  
X Ray ◽  
Column Structure ◽  
Structure Determinations

Three forms (cis-, trans-, β-trans-) of [Pd(NH3)2Cl2] were obtained as pure single-phase powder materials. Ab initio structure determinations using X-ray powder diffraction were carried out. The cis-Pd(NH3)2Cl2 [a = 6.3121 (2), b = 6.4984 (2), c = 3.3886 (1) Å, α = 96.604 (4), β = 97.290 (4), γ = 104.691 (2)°, Z = 1, space group P1] and trans-Pd(NH3)2Cl2 [a = 6.5398 (3), b = 6.8571 (4), c = 6.3573 (3) Å, α = 103.311 (5), β = 102.454 (3), γ = 100.609 (4)°, Z = 2, space group P{\bar 1}] phases have a typical layer-column structure, while β-trans-Pd(NH3)2Cl2 [a = 8.1540 (2), b = 8.1482 (2), c = 7.7945 (1) Å, Z = 4, space group Pbca] is described as a parquet-like layer structure. Both trans phases demonstrate the order-disorder phenomenon. The possible ways of phase transitions are discussed. It is noted that the cis phase can transform into trans in the solid state without destroying the crystal body. Further transformation to β-trans follows through a break up of the crystal body.

Preparation and Characterization of Lead-Free (Ba0.4Sr0.4Ca0.2)(Zr0.05Ti0.95)O3 Ceramics Using BST Seed Induced Method

2018 ◽  
Vol 766 ◽  
pp. 180-185
Author(s):  
Jiraporn Dangsak ◽  
Sukum Eitssayeam ◽  
Tawee Tunkasiri ◽  
Uraiwan Intatha
Keyword(s):  
Solid Solution ◽  
Solid State ◽  
Single Phase ◽  
Seed Crystal ◽  
Lead Free ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Seed Crystals

The solid solution of lead-free (Ba0.4Sr0.4Ca0.2) (Zr0.05Ti0.95) O3 (BSCZT) ceramics were prepared from the seed induced method. The Ba0.6Sr0.4TiO3 (BST) were used as the seed crystals, they were prepared using the molten salt technique. The phase formation was examined using the X-ray diffraction technique (XRD). It was found that the single phase perovskite structure of BST was obtained at a temperature of 800°C. The ceramics were prepared using the conventional solid state reaction by adding of BST seed crystals at 2.5, 5, 7.5 and 10 mol%. The structure showed that a single phase perovskite was obtained after sintered at 1400 °C. This work confirmed that BST seed crystal successfully diffused into BSCZT ceramic and the BSCZT ceramic with a seed crystal showed higher dielectric than the BSCZT ceramic without seed crystals.

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